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Search: Posts Made By: drbitboy
Forum: LIVE PLC Questions And Answers July 31st, 2021, 11:52 PM
Replies: 7
Views: 360
Posted By drbitboy
that was only to present the concept; there are...

that was only to present the concept; there are 240v timers, plus if there are relays involved it does not matter what the timer voltage is anyway.


anyway, it's your thing, you'll figger it out...
Forum: LIVE PLC Questions And Answers July 31st, 2021, 08:42 PM
Replies: 7
Views: 360
Posted By drbitboy
How about KISS, summat like this...

How about KISS, summat like this (https://www.amazon.com/dp/B00MWHQZX0), industrial and outdoors-rated of course, 30-min on, 15min off; wire a logical AND of its output with the level switch command....
Forum: LIVE PLC Questions And Answers July 31st, 2021, 08:28 PM
Replies: 5
Views: 470
Posted By drbitboy
Check the full PDF - it may display the contents...

Check the full PDF - it may display the contents of the PID somewhere other than the ladder diagram.
Forum: LIVE PLC Questions And Answers July 31st, 2021, 11:55 AM
Replies: 5
Views: 470
Posted By drbitboy
FYI, thse .ACD and .APA file will have to be...

FYI, thse .ACD and .APA file will have to be archived into a .ZIP file before they can be attached to a post; see below; .ZIP with empty .ACD and .APA files have been attached to this post as an...
Forum: LIVE PLC Questions And Answers July 30th, 2021, 04:01 PM
Replies: 5
Views: 340
Posted By drbitboy
I am going to assume that is a 16-bit integer. ...

I am going to assume that is a 16-bit integer.
Is it possible the floating-point value you are expecting is positive infinity?

Can you make it some value other than infinity?


Is there a...
Forum: LIVE PLC Questions And Answers July 30th, 2021, 02:08 PM
Replies: 5
Views: 340
Posted By drbitboy
Are you getting that 32-bit floating point as two...

Are you getting that 32-bit floating point as two 16-bit registers using the AOI now?
Forum: LIVE PLC Questions And Answers July 30th, 2021, 10:51 AM
Replies: 7
Views: 360
Posted By drbitboy
and yet we all take out our shotguns. there...

and yet we all take out our shotguns.

there is no easy or polite way to say this: the quickest, best, and perhaps only, way to learn


is to be wrong
and to have someone show you

...
Forum: LIVE PLC Questions And Answers July 29th, 2021, 09:47 PM
Replies: 11
Views: 2,187
Posted By drbitboy
Hah, agreed.

Hah, agreed.
Forum: LIVE PLC Questions And Answers July 29th, 2021, 09:45 PM
Replies: 6
Views: 609
Posted By drbitboy
So OP does not have "an electric actuator with a...

So OP does not have "an electric actuator with a 75% duty cycle," they have an electric actuator that will run whenever it is given a signal to run, as long as that signal is supplied.

That...
Forum: LIVE PLC Questions And Answers July 29th, 2021, 02:27 PM
Replies: 11
Views: 2,187
Posted By drbitboy
As a bit more documentation for folks who find...

As a bit more documentation for folks who find this thread:


Cf. https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1763-rm001_-en-p.pdf#G14.1050611


59044

59045
Forum: LIVE PLC Questions And Answers July 29th, 2021, 11:26 AM
Replies: 6
Views: 609
Posted By drbitboy
LOL gotta love the 'net. 59039 Anyway,...

LOL gotta love the 'net.

59039

Anyway, I am trying to understand OPs process.

Is the duty cycle of the actuator used when moving the valve, i.e. when either opening or closing, presumably...
Forum: LIVE PLC Questions And Answers July 29th, 2021, 12:02 AM
Replies: 22
Views: 1,005
Posted By drbitboy
Even that loop approach was fuglier than I'd...

Even that loop approach was fuglier than I'd hoped for, and on top of that in a 1400 each "caller" would need to move things in and out of the N255 file "arguments," etc.


So yah, I agree, no...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 09:02 PM
Replies: 22
Views: 1,005
Posted By drbitboy
Same idea, general purpose: 59032

Same idea, general purpose:

59032
Forum: LIVE PLC Questions And Answers July 28th, 2021, 06:34 PM
Replies: 21
Views: 976
Posted By drbitboy
It looks to me like there is a logic instruction...

It looks to me like there is a logic instruction (XIC or XIO or summat else?) on feeding the SCP on Rung 001; if the output run of that logic instruction evaluates to false, then the SCP on Rung 0001...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 04:08 PM
Replies: 14
Views: 595
Posted By drbitboy
I was able do open @sharkyho's .RSS, convert it...

I was able do open @sharkyho's .RSS, convert it to Series B, download it my expansion-less MicroLogix 1100 Series B PLC, and switch that PLC to RUN mode without error.

The program has an input map...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 02:33 PM
Replies: 22
Views: 1,005
Posted By drbitboy
Here is why you want to use BTD or even looped...

Here is why you want to use BTD or even looped shifts, and not DIVides.
Forum: LIVE PLC Questions And Answers July 28th, 2021, 01:32 PM
Replies: 14
Views: 595
Posted By drbitboy
0187h; cf. Post #1. I think The Series...

0187h; cf. Post #1.

I think

The Series A 1100 has four expansion modules (three 1762-IQ16 and one 1762-OB16)
The Series A 1100 program is configured with those same four expansion modules.
...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 11:12 AM
Replies: 14
Views: 595
Posted By drbitboy
Welcome to the forum! Can you post the...

Welcome to the forum!


Can you post the program i.e. the original, for (what I assume is) Micrologix 1100 Series A?


Did you do a search on either the forum or The Google for something like...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 11:01 AM
Replies: 4
Views: 290
Posted By drbitboy
The manual (click here...

The manual (click here (https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1762-rm001_-en-p.pdf#G14.1051171)) claims Floating-point data files are allowed for the SCP...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 10:06 AM
Replies: 4
Views: 290
Posted By drbitboy
1) It appears that that does not make sense as...

1) It appears that that does not make sense as you have described it. That said, I have found that processors do not care about what the manual says or what makes sense, they can only do what they...
Forum: LIVE PLC Questions And Answers July 28th, 2021, 06:18 AM
Replies: 8
Views: 584
Posted By drbitboy
https://literature.rockwellautomation.com/idc/grou...

https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1785-rm001_-en-p.pdf#%5B%7B%22num%22%3A1869%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C728%2Cnull%5D
59020
Forum: LIVE PLC Questions And Answers July 28th, 2021, 06:05 AM
Replies: 22
Views: 1,005
Posted By drbitboy
Oh, and CCW? Yeah, it has a multi-bit right...

Oh, and CCW? Yeah, it has a multi-bit right shift, but the manual has not a whit of a whisper of a ghost of a clue what it does about the sign bit

59019


ROTFLOL
Forum: LIVE PLC Questions And Answers July 28th, 2021, 05:25 AM
Replies: 22
Views: 1,005
Posted By drbitboy
we don't know?yes, also RSLogix 5/PLC-5. ...

we don't know?yes, also RSLogix 5/PLC-5.

P.S. MVM+shift is less useful than AND+shift here as MVM does not clear higher bits. Does BTD clear destination INT's bits outside its mask?

P.P.S....
Forum: LIVE PLC Questions And Answers July 27th, 2021, 11:37 PM
Replies: 22
Views: 1,005
Posted By drbitboy
Single-instruction alternative to MVM+[shift or...

Single-instruction alternative to MVM+[shift or divide]:


CPT tenbits_12_to_3 (sixteenbits AND 8184)/8

mask of 8184 = (2**13)-8

$ python
Python 3.8.8 [...]
>>> bin(8184)
Forum: LIVE PLC Questions And Answers July 27th, 2021, 10:58 PM
Replies: 22
Views: 1,005
Posted By drbitboy
d'Oh! I knew that, but forgot!

d'Oh! I knew that, but forgot!
Showing results 1 to 25 of 500

 
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